The force diagram of the given problem is shown below:
where,
F: applied force = 185N
Fx: horizontal component of F = 185N*cos25 = 167.67N
Fy: vertical component of F = 185N*sin25 = 78.18N
W: weight of the box
N: normal force
The net force is in the direction of the motion. It means that vertical forces does not generate a net force.
Due to the friction is negligible, the horizontal component of the appiled force is the net force, then:
Fnet = Fx = 167.67N
